#include<iostream>
#include<Eigen/Dense>

using namespace std;
using namespace Eigen;

// resize matrix vector

int main(int argc,char **argv){

    MatrixXd m(2,5);
    m.resize(4,3);

    std::cout << "The matrix m is of size "
              << m.rows() << "x" << m.cols() << std::endl;

    std::cout << "It has " << m.size() << " coefficients" << std::endl;

    VectorXd v(2);
    v.resize(5);

    std::cout << "The vector v is of size " << v.size() << std::endl;
    std::cout << "As a matrix, v is of size "
              << v.rows() << "x" << v.cols() << std::endl;

    return 0;
}
